CVE Watch24 jul 2026

CVE-2026-35031

Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain a vulnerability chain in the subtitle upload endpoint

CVSS

9.9

Crítico

EPSS

0.8%

p52

KEV

—

Exploit Today

0-100

Publicado: 14 abr 2026 · Última mod.: 24 jul 2026 · CWE-20 · CWE-22 · CWE-187

EPSS · 30d

0.8%EPSS · 30 días0.8%

2026-07-142026-08-10

Descripción técnica

Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain a vulnerability chain in the subtitle upload endpoint (POST /Videos/{itemId}/Subtitles), where the Format field is not validated, allowing path traversal via the file extension and enabling arbitrary file write. This arbitrary file write can be chained into arbitrary file read via .strm files, database extraction, admin privilege escalation, and ultimately remote code execution as root via ld.so.preload. Exploitation requires an administrator account or a user that has been explicitly granted the "Upload Subtitles" permission. This issue has been fixed in version 10.11.7. If users are unable to upgrade immediately, they can grant non-administrator users Subtitle upload permissions to reduce attack surface.

Referencias oficiales

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